CN105647556B - It is a kind of using blast furnace slag waste heat recycling plastics and the simultaneous techniques of innoxious chromium slag - Google Patents
It is a kind of using blast furnace slag waste heat recycling plastics and the simultaneous techniques of innoxious chromium slag Download PDFInfo
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- CN105647556B CN105647556B CN201610035266.9A CN201610035266A CN105647556B CN 105647556 B CN105647556 B CN 105647556B CN 201610035266 A CN201610035266 A CN 201610035266A CN 105647556 B CN105647556 B CN 105647556B
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- 239000002893 slag Substances 0.000 title claims abstract description 119
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000011651 chromium Substances 0.000 title claims abstract description 87
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 83
- 239000004033 plastic Substances 0.000 title claims abstract description 51
- 229920003023 plastic Polymers 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004064 recycling Methods 0.000 title claims description 8
- 239000002918 waste heat Substances 0.000 title claims description 8
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 53
- 239000000498 cooling water Substances 0.000 claims description 25
- 230000032258 transport Effects 0.000 claims description 12
- 238000001833 catalytic reforming Methods 0.000 claims description 10
- 238000000197 pyrolysis Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000008246 gaseous mixture Substances 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910000514 dolomite Inorganic materials 0.000 claims 1
- 239000010459 dolomite Substances 0.000 claims 1
- 239000011943 nanocatalyst Substances 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 7
- 239000002920 hazardous waste Substances 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 238000004939 coking Methods 0.000 abstract description 2
- 238000002309 gasification Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 231100000419 toxicity Toxicity 0.000 description 4
- 230000001988 toxicity Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 230000010512 thermal transition Effects 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000007233 catalytic pyrolysis Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
- B09B3/45—Steam treatment, e.g. supercritical water gasification or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/16—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with moving solid heat-carriers in divided form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention is the method for synchronization process liquid blast furnace, chromium slag and plastics, it is heated by blast furnace slag and the plastics that gasify, the catalyst high-temperature catalytics such as hazardous waste chromium slag are recycled to crack plastics, under conditions of steam gasification more thoroughly by converting-plastics be low molecular high temperature energy gas, avoid the coking on chromium slag surface.Chromium slag is heated using high temperature energy gas simultaneously, while making hexavalent chrome reduction trivalent chromium in chromium slag, energy gas is cooled down in passing, and the CO2 and Cl in energy gas are absorbed by the alkaline matter in chromium slag.The energy is greatly saved while innoxious chromium slag, cooling blast furnace slag in this technique, while obtaining high-grade energy source gas.
Description
Technical field
The method that the present invention is synchronization process chromium slag and plastics and cooling blast furnace slag, in innoxious chromium slag, obtains height
While the energy source gas of grade, the energy is greatly saved, simultaneously.Belong to environmental protection and low-carbon technology field.
Background technique
Chromium slag is the by-product discharged in bichromate production process.Have because wherein containing water soluble hexavalent chromium greatly
Toxicity will cause different degrees of pollution to underground water source, river or sea area, sternly if the air storage without processing
The growth of weight being detrimental to health with animals and plants.
On the whole, the detoxification (the high Cr VI of toxicity is become trivalent chromium) of chromium slag is divided into wet method detoxifcation at present
With dry detoxified two major classes.But there is respective problem.Wet process is will be by adding reducing agent for Cr in chromium slag6+In liquid-phase reduction solution
The method of poison.But method reagent consumption is big, at high cost, is also difficult at present on a large scale for administering chromium slag.Dry detoxified is both logical
The strong reducing action for crossing high temperature reducing atmosphere makes hexavalent chrome reduction trivalent chromium in chromium slag achieve the purpose that removing toxic substances.Traditional is dry
Method improvement is to make reducing agent with carbon, and 1000 DEG C or so are heated in restoring property atmosphere toxic Cr6+It is reduced into nontoxic Cr6 +, large-scale application has certain economic benefit in the improvement of chromium slag to the method, but pollutes in treatment process with secondary dust,
And cost of investment is high, energy consumption is high.
Plastics are a kind of white pollutions.There is also various problems for its processing method at present.Because it contains Cl, therefore burns and be easy
Generate dioxin.Pyrolysis made fuel oil, gas are a kind of methods more practical at present, and application number 2011103660279 discloses
A kind of two-step method prepares the method for fuel oil gas using plastics, and for the first step in low temperature volatilization HCl, second step cracks plastics preparation oil
Gas.Though this method is more practical, due to carrying out two-step method, reaction time is long.Furthermore in engineering construction, HCl has been not easy
It volatilizes entirely, the remaining Cl in part is easily accessible in the cracking oil gas of second step to pollute it.
In addition, China generates a large amount of blast furnace slag every year, liquid blast furnace temperature is high, 1500-1700 DEG C of temperature, if energy
It utilizes carefully, will be valuable resource.But current few technologies efficiently use thermal energy therein.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is the processing disposition of a kind of novel chromium slag, plastics and liquid blast furnace
Method.By technology controlling and process, by liquid blast furnace effectively cooling and its thermal energy can be efficiently used, while be by converting-plastics
High-quality energy source gas, and will be while Cr VI efficiently restores in chromium slag.
This process technology scheme are as follows: heat liquid blast furnace and gasify plastics and cooling water, followed by hazardous waste
Chromium slag high-temperature catalytic crack plastic cracking gas, under conditions of steam gasification more thoroughly by converting-plastics be it is low molecular
High temperature energy gas (H2, CO and CH4 etc.), avoids the coking on chromium slag surface.And the high temperature energy gas that plastics generate simultaneously
Chromium slag is heated again, while making hexavalent chrome reduction trivalent chromium in chromium slag, low temperature chromium slag is allowed to cool down energy gas in passing,
And the Cl and CO2 in energy gas are absorbed by the alkaline matter in chromium slag.This technique greatlys save while innoxious chromium slag
The energy, at the same obtain it is high-grade can source gas.
Method of the invention specifically includes the following steps:
(1) 1500-1700 DEG C of temperature of liquid blast furnace is poured onto wheeled setting gauge arrival end by slag ladle, through quantitative material toggling
And after being tentatively crushed, enters roller smashing device inlet from outlet end, mixed with plastics, and plastics are pyrolyzed, subsequent blast furnace
Slag and plastics pyrolysis coke transport to roller smashing device outlet end, discharge after cooling water is cooling；The cooling water of cooling blast furnace slag
Continuous input quality ratio with blast furnace slag is 1:(1-8)；The continuous input quality ratio of plastics and blast furnace slag is 1:(1-8)；
(2) cooling water in step (1) is added from roller smashing device outlet end, and spray to blast furnace slag surface is by thermal transition
For vapor；Vapor then with blast furnace slag reverse flow and exchange heat, transport to roller smashing device arrival end and plastics pyrolysis gas
Mixing；Gaseous mixture then transports to wheeled setting gauge and exchanges heat with high temperature blast furnace slag, is converted into 1000-1400 DEG C of high temperature mixing
Gas；
(3) gaseous mixture in step (2) is transported into catalytic reforming furnace, the calcined chromium slag of load, mixed gas add in furnace
The chromium slag of hot the inside carries out catalytic reforming within the scope of 800-1200 DEG C, generates energy gas；
(4) the high temperature energy gas generated in step (3) is subsequently input in internal heat type rotary kiln end, continuously defeated with kiln tail
The chromium slag brought carries out heat exchange processing, while hexavalent chrome reduction in chromium slag is trivalent chromium by energy gas；High temperature energy gas
It after temperature is reduced to 250 DEG C or less, is discharged from rotary kiln, into condensing unit, between cooling water reverse flow and occurring
Heat exchange is connect, is collected after condensation dehydration；High temperature chromium slag after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling
Discharge after water is cooled to 150 DEG C or less, while being higher than room using generated vapor control cooling device air pressure inside
Outer air pressure 0-30kp；The high temperature energy gas continuously generated and the mass ratio of the chromium slag continuously inputted are controlled at (1-8): 4；
(5) the high temperature chromium slag in step (4) after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling water
Discharge after being cooled to 150 DEG C or less, while being higher than outdoor using generated vapor control cooling device air pressure inside
Air pressure 0-30kp；
Compared to traditional plastic processing methods, this method has following advantage:
1. heating using high-temperature liquid state blast furnace slag and gasify plastics and cooling water, plastic cracking product and vapor are generated,
Preparation high-quality energy source gas is catalyzed for pyrolysis product to create conditions；Thermal energy is taken full advantage of simultaneously, substantially increases energy efficiency；
2. also achieving chromium slag while avoiding using expensive catalyst using chromium slag hazardous waste chromium slag catalysis plastics
It is innoxious；
3., so that chromium slag, after reduction treatment, surface coke content greatly reduces, being conducive to handle because of the effect of high-temperature steam
The secondary use of chromium slag afterwards；
4. using high temperature energy gas heating generated after catalytic reforming and innoxious chromium slag, while having saved additional cold
But the equipment of high-temperature gas；
5. taking full advantage of the water vapour that technique each stage generates to be conducive to without extra heat source auxiliary production steam
Energy conservation, while reducing the discharge of steam, avoid secondary thermal pollution；
6. by-product CO2 for generating etc. can be by alkalinity such as CaO in chromium slag in the energy source gas that plastics catalytic pyrolysis generates
Material absorbing improves fuel product quality；
7. the cooling chromium slag of the cooling equipment utilization cooling water of chromium slag, while generating steam, aggrandizement apparatus air pressure inside is prevented
Outside air enters system, the trivalent chromium after redox, while avoiding and using additional device control pressure.
Detailed description of the invention
Fig. 1 is process flow chart
Fig. 2 is liquid blast furnace poking device and smashing device
Wherein 1 liquid chromium slag entrance；2 mixed gas outlets；At 3 cooling water inlets；At 4 plastic inlets；5 wheeled groups
Glassware；6 blast furnace slag exits；7 roller smashing devices；8 wheeled setting gauges and roller smashing device connector；9 gears.
It is as follows that example is embodied:
(1) 1500-1700 DEG C of temperature of liquid blast furnace is poured onto wheeled setting gauge arrival end by slag ladle, through quantitative material toggling
And after being tentatively crushed, enters roller smashing device inlet from outlet end, mixed with plastics, and plastics are pyrolyzed, subsequent blast furnace
Slag and plastics pyrolysis coke transport to roller smashing device outlet end, discharge after cooling water is cooling；The cooling water of cooling blast furnace slag
Continuous input quality ratio with blast furnace slag is 1:2；The continuous input quality ratio of plastics and blast furnace slag is 1:2；
(2) cooling water in step (1) is added from roller smashing device outlet end, and spray to blast furnace slag surface is by thermal transition
For vapor；Vapor then with blast furnace slag reverse flow and exchange heat, transport to roller smashing device arrival end and plastics pyrolysis gas
Mixing；Gaseous mixture then transports to wheeled setting gauge and exchanges heat with high temperature blast furnace slag, is converted into 1000 DEG C of high-temperature gas mixture；
(3) gaseous mixture in step (2) is transported into catalytic reforming furnace, the calcined chromium slag of load, mixed gas add in furnace
The chromium slag of hot the inside carries out catalytic reforming within the scope of 800 DEG C, generates energy gas；
(4) the high temperature energy gas generated in step (3) is subsequently input in internal heat type rotary kiln end, continuously defeated with kiln tail
The chromium slag brought carries out heat exchange processing, while hexavalent chrome reduction in chromium slag is trivalent chromium by energy gas；High temperature energy gas
It after temperature is reduced to 250 DEG C or less, is discharged from rotary kiln, into condensing unit, between cooling water reverse flow and occurring
Heat exchange is connect, is collected after condensation dehydration；High temperature chromium slag after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling
Discharge after water is cooled to 150 DEG C or less, while being higher than room using generated vapor control cooling device air pressure inside
Outer air pressure 0-30kp；The high temperature energy gas continuously generated and the mass ratio of the chromium slag continuously inputted are controlled in 2:1；
(5) the high temperature chromium slag in step (4) after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling water
Discharge after being cooled to 150 DEG C or less, while being higher than outdoor using generated vapor control cooling device air pressure inside
Air pressure 0-30kp；
(6) toxicity characteristic leaching procedure is carried out to chromium slag after processing using 5086.2 horizontal vibration method of national standard GB, measures water solubility
Chromium is 0.01mg/L, is significantly less than 5085.3 hazardous waste upper limit 1.5mg/L of national standard GB；Plastics per ton generate 0.6-0.7t energy
Source gas, flammable Gas content are higher than 80%.
Example 2:
(1) 1500-1700 DEG C of temperature of liquid blast furnace is poured onto wheeled setting gauge arrival end by slag ladle, through quantitative material toggling
And after being tentatively crushed, enters roller smashing device inlet from outlet end, mixed with plastics, and plastics are pyrolyzed, subsequent blast furnace
Slag and plastics pyrolysis coke transport to roller smashing device outlet end, discharge after cooling water is cooling；The cooling water of cooling blast furnace slag
Continuous input quality ratio with blast furnace slag is 1:4；The continuous input quality ratio of plastics and blast furnace slag is 1:2；
(2) cooling water in step (1) is added from roller smashing device outlet end, and spray to blast furnace slag surface is by thermal transition
For vapor；Vapor then with blast furnace slag reverse flow and exchange heat, transport to roller smashing device arrival end and plastics pyrolysis gas
Mixing；Gaseous mixture then transports to wheeled setting gauge and exchanges heat with high temperature blast furnace slag, is converted into 1400 DEG C of high-temperature gas mixture；
(3) gaseous mixture in step (2) is transported into catalytic reforming furnace, the calcined chromium slag of load, mixed gas add in furnace
The chromium slag of hot the inside carries out catalytic reforming within the scope of 800 DEG C, generates energy gas；
(4) the high temperature energy gas generated in step (3) is subsequently input in internal heat type rotary kiln end, continuously defeated with kiln tail
The chromium slag brought carries out heat exchange processing, while hexavalent chrome reduction in chromium slag is trivalent chromium by energy gas；High temperature energy gas
It after temperature is reduced to 250 DEG C or less, is discharged from rotary kiln, into condensing unit, between cooling water reverse flow and occurring
Heat exchange is connect, is collected after condensation dehydration；High temperature chromium slag after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling
Discharge after water is cooled to 150 DEG C or less, while being higher than room using generated vapor control cooling device air pressure inside
Outer air pressure 0-30kp；The high temperature energy gas continuously generated and the mass ratio of the chromium slag continuously inputted are controlled in 1:1；
(5) the high temperature chromium slag in step (4) after heat exchange is discharged from rotary kiln end, into cooling device, uses cooling water
Discharge after being cooled to 150 DEG C or less, while being higher than outdoor using generated vapor control cooling device air pressure inside
Air pressure 0-30kp；
(6) toxicity characteristic leaching procedure is carried out to chromium slag after processing using 5086.2 horizontal vibration method of national standard GB, measures water solubility
Chromium is 0.01mg/L, is significantly less than 5085.3 hazardous waste upper limit 1.5mg/L of national standard GB；Plastics per ton generate 0.6-0.7t energy
Source gas, flammable Gas content are higher than 80%.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned
Invention is explained in detail for embodiment, for those of ordinary skill in the art, still can be to aforementioned
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are repaired
Change or replaces, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag, which is characterized in that including as follows
Step:
(1) 1500-1700 DEG C of temperature of liquid blast furnace is poured onto wheeled setting gauge arrival end by slag ladle, through quantitative material toggling and just
After step is broken, enters roller smashing device inlet from outlet end, mix with plastics, and plastics are pyrolyzed, subsequent blast furnace slag and
Plastics pyrolysis coke transports to roller smashing device outlet end, discharges after cooling water is cooling；
(2) cooling water in step (1) is added from roller smashing device outlet end, and spray is converted into water to blast furnace slag surface is heated
Steam；Vapor then with blast furnace slag reverse flow and exchange heat, transport to roller smashing device arrival end and mixed with plastics pyrolysis gas；
Gaseous mixture then transports to wheeled setting gauge and exchanges heat with high temperature blast furnace slag, is converted into 1000-1400 DEG C of high-temperature gas mixture；
(3) gaseous mixture in step (2) is transported into catalytic reforming furnace, the calcined chromium slag of load in furnace, in mixed gas heating
The chromium slag in face carries out catalytic reforming within the scope of 800-1200 DEG C, generates energy gas；
(4) the high temperature energy gas generated in step (3) is subsequently input in internal heat type rotary kiln end, is continuously conveyed with kiln tail
The chromium slag come carries out heat exchange processing, while hexavalent chrome reduction in chromium slag is trivalent chromium by energy gas；High temperature energy gas temperature
It after being reduced to 250 DEG C or less, is discharged from rotary kiln, into condensing unit, with cooling water reverse flow and generation is changed indirectly
Heat is collected after condensation dehydration；
(5) the high temperature chromium slag in step (4) after heat exchange is discharged from rotary kiln end, into cooling device, using cooling water by its
Discharge after being cooled to 150 DEG C or less, while being higher than outdoor air pressure using generated vapor control cooling device air pressure inside
0-30kPa。
2. it is according to claim 1 a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag,
It is characterized in that, the cooling water of cooling blast furnace slag and the continuous input quality ratio of blast furnace slag are 1:(1-8).
3. it is according to claim 1 a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag,
It is characterized in that, the continuous input quality ratio of plastics and blast furnace slag is 1:(1-8).
4. it is according to claim 1 a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag,
It is characterized in that, the high temperature energy gas continuously generated and the mass ratio of the chromium slag continuously inputted are controlled at (1-8): 4.
5. it is according to claim 1 a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag,
It is characterized in that, the cooling water of cooling blast furnace slag and the continuous input quality of plastics are than control at (0.2-5): 1.
6. it is according to claim 1 a kind of using blast furnace slag waste heat recycling plastics and the synchronous method of innoxious chromium slag,
It is characterized in that, the chromium slag loaded in catalytic reforming furnace can be substituted by dolomite, Al2O3 base nano catalyst.
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| CN201610035266.9A CN105647556B (en) | 2016-01-19 | 2016-01-19 | It is a kind of using blast furnace slag waste heat recycling plastics and the simultaneous techniques of innoxious chromium slag |
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| CN105647556B true CN105647556B (en) | 2019-07-30 |
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